<template>
	<view>
    <view class="search-box">
      <uni-search-bar @confirm="search" @input="input" :radius="100" cancelButton="none"></uni-search-bar>
    </view>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchResults.length !==0">
      <view class="sugg-item" v-for="item,i in searchResults" :key="i" @click="gotoDetail(item)">
        <view class="goods-name">{{item.goods_name}} </view>
          <uni-icons type="arrowright" size="16"></uni-icons>
      
      </view>
    </view>
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜素历史</text>
       <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list"> 
        <uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view> 
    </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
        kw:'',
        //搜索的结果列表
        searchResults:[],
        //搜索历史的数组
        historyList:[]
			};
		},
    onLoad(){
     this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]') 
    },
    methods:{
      //input输入事件的处理函数
      input(e){
       clearTimeout(this.timer)
       this.timer= setTimeout(()=>{
          this.kw = e.value
          this.getSearchList()
        },500)
      },
     async getSearchList(){
        if(this.kw.length===0){
          this.searchResults=[]
          return
        }
     const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
     if(res.meta.status !==200) return uni.$showMsg()
     this.searchResults = res.message
     
     this.saveSearchHistory()
      },
      gotoDetail(item){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
        })
      },
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        
       const set = new Set(this.historyList)
       set.delete(this.kw)
       set.add(this.kw)
       this.historyList= Array.from(set)
       //对搜索历史数据，进行持久化的存储
       uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      clean(){
        this.historyList = []
        uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query='+item
        })
      }
    },
    computed:{
      histories(){
       return [...this.historyList].reverse()
      }
    }
	}
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef; 
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}
.history-box{
  padding: 0 5px;
  .history-title{
  display: flex;
  justify-content: space-between;
  height: 40px;
  align-items: center;
  font-size: 13px;
  border-bottom: 1px solid #efefef;
  }
  .history-list{
    display: flex;
    flex-wrap: wrap;
    .uni-tag{
      margin-top: 5px;
      margin-right: 5px;
    }
    }
}

</style>
